Refrigerator with defrosting arrangement



Aug. 4, 1953 F. R. cARLssoN 2,647,376

REFRIGERATOR WITH DEFRosTING ARRANGmENT Filed Feb. 11, 1952 R n Summer lPatented Aug. 4, 1953 REFRIGERATOR WITH DEFROSTING ARRANGEMEN T FilipReinhold Carlsson, Eskilstuna, Sweden Application February 11, 1952,Serial No. 271,053 In Sweden March 2, 1951 1 Claim. l

This invention relates to a device for eliminating the drawbacks inrefrigerators, occurring on defrosting the cooling elements.

As is well known, a substantial drawback in refrigerators is caused bythe cooling elements having often to be defrosted, that is the ice-layerformed on the cooling element, which deteriorates the cooling effect ofthe element has to be removed. If this does not occur sufficiently oftenthe quality of the goods will be deteriorated that is ice crystals willbe formed on it. Moreover the refrigerator will work uneconomically asby the increase of the ice layer the effect becomes lower. On removingthe ice layer the temperature of the element is increased so as the icemelts and consequently the temperature in the refrigerating boxincreases. This involves a substantial loss in the cooling effect andbesides that there is danger, that the goods placed in the refrigeratingbox will be damaged during the melting.

One object of the invention is to provide a method for eliminating theaforesaid drawbacks in a refrigerator consisting of a refrigerator boxand a cooling element, by removing the cooling element from therefrigerator box without taking out the goods to be refrigerated closingthe box in order to substantially maintain the temperature of the goodsand inserting the defrosted cooling element in the refrigerator box.

Another object of the invention is to provide a device consisting of arefrigerator box and a cooling element which have a changeable positionrelatively to each other in order to remove the cooling element duringoperation, the box being provided with an opening for the coolingelement, which opening when the element is inserted in the box is closedby a packing around the element while in defrosting position it isclosed by a cover. Through such a device a refrigerated goods ofexcellent quality is obtained and the used effect will become low.

The invention is shown by way of illustration in the accompanyingdrawing according to which a refrigerator box I is provided with rollersor wheels 2 for facilitating the removal of same. The refrigerator boxis provided with shelves la for the goods to be refrigerated and with anopening 3a for inserting and removing the goods and another opening 3for the cooling element. A

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cooling element 4 is mounted on a wall or stand 5 by means of a housingda which nts into the last-'mentioned opening 3 for closing the same andencloses a connection between the element 4 and a conduit 4b for thecooling fluid. The element 4 is adapted to extend within refrigeratorbox during operation. The opening 3a is provided with a cover 6a. Thedrawing shows the device in the position where the defrosting occurs,the opening 3 being covered by a heat isolating cover 6 which preventsthe inner temperature of the refrigerator box to change substantiallywhile the cooling element is outside of the refrigerator box. Defrostingof the cooling element occurs in ordinary manner, whereupon the cover Eis removed and the refrigerator box is displaced in such manner that thecooling element is extending againin the freezing box and by a packinglia closes the opening 3. y

lt is evident that also the freezing box can'be stationary and thecooling element transportable if it is more suitable for thelconstruction but it is understood that various changes may beresortedto within the scope of the appended claim.

What I claim is:

The combination of a refrigerator box and a cooling element adapted tobe removably positioned therein, said cooling element being xedlymounted on a wall or the like, roller means supporting the box to permitthe displacement of the box from a cooling position, in which thecooling element is positioned within the box, to a defrosting position,in which the cooling element is positioned outside the box, said boxhaving an opening for the lcooling element, and a lid for closing saidopeningv when the box is displaced away from the cooling element, saidopening and said ycooling element having cooperating surfaces adapted toclose said opening when the cooling element is positioned within saidbox.

FILIP REINHOLD CARLSSON.

References Cited in the le of this patent UNITED STATES PATENTS NumberName Date 1,949,663 Sellman Mar. 6, 1934 2,433,655 Di Zoppola Dec. 30,1947

